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Same from here Dennis, clean install, nice
work.
Greg Ward
----- Original Message -----
Sent: Monday, January 07, 2008 5:09
PM
Subject: [FlyRotary] Re: 60 Hour
Inspecton
Excellent Dennis!! Great
workmanship!!
Joe Berki
Limo EZ
----- Original Message -----
Sent: Monday, January 07, 2008 6:33
PM
Subject: [FlyRotary] 60 Hour
Inspecton
60 Hour Inspection : RV-7A, RX-8 Renesis engine,
James Rotary Cowl, Radiators under engine
As of January 08 I've flown
my Renesis powered RV-7A about 60 hours. At the 60 hour mark I did a
detailed inspection of the intake and exhaust systems as well as everything
else under the cowl.
I found no cracks or other problems with the
exhaust system!! The heat shield between the muffler and the left cowl
had lost one attachment screw- no big deal. Attached are pictures of
the exhaust. I use a stock RX-8 exhaust manifold - a 4 in dia. X
approx. 6 inch long swirl pipe(see third picture) to redirect the exhaust
from the front to the rear of the plane and a Flowmaster Hushpower
Resonator (PN - 12512400) as the exhaust muffler. Everyone who hears
the airplane fly comments on how quiet the engine is - neighbors call it the
Stealth Rotary RV! It is super quiet compared to my neighbors 180
Lycom. RV-7A. I don't know if the Flowmaster muffler will
withstand the exhaust pulses from the RX-7 engine rotors but I feel
confident the muffler will work with the Renesis. Mark Steitle with
his 20 B engine and Flowmaster resonator will have first hand knowledge
soon!
I had previously found that one EGT probe extension wire melted
- it was about 8 inches from the exhaust system. The probe wires
leads were not damaged but the extension thermocouple wire from
A/S had insulation that melted from the exhaust heat. I have rerouted
the extension wire to keep it away from the exhaust.
There were no
problems with the intake system. It is fabricated using part of the
RX-8 manifold and a home-made intake plenum. I used the stock
injectors, fuel rails and injector locations. The fuel pulse damper
was removed! (Pictures in next E-Mail)
I did find several very small
oil leaks in the casting of the PSRU. I'll confer with Tracy as to how
to address these.
I used the James Rotary Cowl - same one as the
Power Sport rotary used - mounted my oil and water radiators
underneath the engine, bought an engine from a wrecked RX-8
with less than 10,000 miles on it. The engine was not disassembled.
I also used (with some modifications) the exhaust, intake, fuel
injection parts, spark plugs, plug wires, coils, 100 amp alternator, oil
injecton with Richards adaptor, water pump and water outlet system
with the thermostat removed. (See attached pictures)
I will be adding
a cowl flap to keep the oil and water temps. cooler in the hottest summer
and warmer in the coldest winter temperatures.
My prop is a Catto 76
in. dia X 88 in. pitch and my max. cruise rpm is only 6200. I am over-
propped for the HP currently being produced. This does allow me to
cruise at rpms around 5400 when I want to go fairly fast and keep fuel flow
down.
My intake and muffler systems could be improved to
raise HP. I've been flying side-by-side with my neighbors RV-7A with a
Lyco. 180 HP engine and a metal fixed pitch prop. At the same take-off
weight we climb about the same rate and in cruise we are about the same
speed. I believe I will be slightly faster above 8000 feet alt. in
cruise.
My success so far is in large part due to the
contributions others have made to my project by posting - their successes
and failures, thoughts, knowledge, suggestions and references to other
sources - to this list!!!
A Special "Thank You" to Ed Anderson, Lynn
Hanover, Al Gietzen and all the other contributors for all the great
knowledge they bring to the rotary group!
Dennis Haverlah
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